The improvement of cascaded converter design using quadratic boosting structure with high voltage gain and low duty cycle

2019 ◽  
Author(s):  
Yiyang Li ◽  
Swamidoss Sathiakumar
Keyword(s):  
High Voltage ◽  
Duty Cycle ◽  
Voltage Gain ◽  
Low Duty Cycle ◽  
High Voltage Gain ◽  
Cascaded Converter ◽  
Converter Design

scholarly journals Conversor Doubler Output Coupled Inductor para Aplicações de Fontes Alternativas

2021 ◽  
Author(s):  
HENRIQUE JAHNKE HOCH ◽  
TIAGO MIGUEL KLEIN FAISTEL ◽  
ADEMIR TOEBE ◽  
ANTóNIO MANUEL SANTOS SPENCER ANDRADE
Keyword(s):  
High Voltage ◽  
Duty Cycle ◽  
Low Voltage ◽  
Energy Generation ◽  
Boost Converter ◽  
Voltage Gain ◽  
Switched Capacitors ◽  
Number Of Components ◽  
Photovoltaic Energy ◽  
High Voltage Gain

High step-up DC-DC converters are necessary in photovoltaic energy generation, due the low voltage of the panels source. This article propose the Doubler Output Coupled Inductor converter. This converter is based in boost converter and utilize switched capacitors and a coupled inductor to maximize the static voltage gain. The converter achieve a high voltage gain with low turns ratio in the coupled inductor and an acceptable duty cycle. Can highlight the converter utilize low number of components and have low voltage and current stresses in semiconductors. To validate and evaluate the operation of the converter a 200W prototype is simulated.

scholarly journals A dual-switch cubic SEPIC converter with extra high voltage gain

2021 ◽  
Vol 12 (1) ◽  
pp. 199
Author(s):  
Christophe Raoul Fotso Mbobda ◽  
Alain Moise Dikandé
Keyword(s):  
High Voltage ◽  
Duty Cycle ◽  
Magnetic Coupling ◽  
Conversion Ratio ◽  
Duty Ratio ◽  
Voltage Gain ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Extra High Voltage ◽  
Voltage Conversion

To provide a high votage conversion ratio, conventional non-isolated DC-DC boost topologies, which have reduced voltage boost capability, have to operate with extremely high duty cycle ratio, higher than 0.9. This paper proposes a DC-DC converter which is mainly based on the narrow range of duty cycle ratio to achieve extra high voltage conversion gain at relatively reduced voltage stress on semiconductors. In addition, it does include any magnetic coupling structure. The structure of the proposed converter combines the new hybrid SEPIC converter and voltage multiplier cells. From the steady-state analysis, this converter has wide conversion ratio and cubic dependence with respect to the duty ratio and then, can increase the output voltage several times more than the conventional and quadratic converters at the same duty cycle ratio. However, the proposed dual-switch cubic SEPIC converter must withstand higher voltage stress on output switches. To overcome this drawback, an extension of the proposed converter is also introduced and discussed. The superiority of the proposed converter is mainly based on its cubic dependence on the duty cycle ratio that allows it to achieve extra high voltage gain at reduced voltage stress on semiconductors. Simulation results are shown and they corroborate the feasibility, practicality and validity of the concepts of the proposed converter.

scholarly journals High-Gain High-Efficiency DC–DC Converter with Single-Core Parallel Operation Switched Inductors and Rectifier Voltage Multiplier Cell

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4634
Author(s):  
Eduardo Augusto Oliveira Barbosa ◽  
Márcio Rodrigo Santos de Carvalho ◽  
Leonardo Rodrigues Limongi ◽  
Marcelo Cabral Cavalcanti ◽  
Eduardo José Barbosa ◽  
...  
Keyword(s):  
High Voltage ◽  
Duty Cycle ◽  
High Efficiency ◽  
High Gain ◽  
Voltage Gain ◽  
Parallel Operation ◽  
Voltage Multiplier ◽  
Coupled Inductors ◽  
High Voltage Gain

This paper proposes a high step-up high-efficiency converter, comprised of an active switched coupled-inductor cell. The secondary windings are integrated into a rectifier voltage multiplier cell in a boost-flyback configuration, allowing the operation with high voltage gain with low switches duty cycle and low turn-ratios on the coupled-inductors. Both coupled-inductors are integrated into a single core due to the parallel operation of the switches. The leakage inductances of the coupled-inductors are used to mitigate the reverse recovery currents of the diodes, while regenerative clamp circuits are used to protect the switches from the voltage spikes caused by the leakage inductances. The operation of the converter is analyzed both quantitatively and qualitatively, and the achieved results are validated through experimentation of a 400 W prototype. A 97.1% CEC efficiency is also reported.

An improved DC-DC converter with high voltage gain based on fully tapped quadratic boost converter for grid connected solar PV micro-inverter

2020 ◽  
pp. 014233122092198
Author(s):  
Lakhdar Bentouati ◽  
Ali Cheknane ◽  
Boumediène Benyoucef ◽  
Oscar Barambones
Keyword(s):  
High Voltage ◽  
Duty Cycle ◽  
Boost Converter ◽  
Maximum Efficiency ◽  
Duty Ratio ◽  
Voltage Gain ◽  
Solar Pv ◽  
Pv Systems ◽  
High Voltage Gain ◽  
Urgent Task

The need to increase the voltage level produced by PV systems becomes an urgent task to be compatible with the requirements of the AC load, but we meet problems in the operation of the step-up converter at a high duty cycle which is not preferred due to the reduction in voltage gain, and also a higher number of turns ratio in the windings inductance coupled adds to the overall losses of the converter. This article proposes an improved DC-DC converter with a lower duty cycle by integrating three tapped-inductors in new topology, which combined quadratic boost converter and tapped-inductor boost converter. The proposed converter achieves a high voltage gain with a lower duty ratio (Gmax = 14.32) and a maximum efficiency of 98.68% is improved compared to the voltage gain and efficiency results of these converters in several recently published references. The analyses are done theoretically and supported with simulation results. A prototype of the proposed converter has been built to experimentally validate the obtained results.

scholarly journals A Transformer less Buck-Boost Converter with Single Switch

2020 ◽  
Vol 9 (12) ◽  
pp. 355-358
Keyword(s):  
High Voltage ◽  
Duty Cycle ◽  
Boost Converter ◽  
Voltage Gain ◽  
Improve Efficiency ◽  
Conduction Loss ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Active Switch

This paper introduces a modern, transformerless buck-boost dc-dc converter. In this topology, one active switch is used. The proposed buck-boost converter voltage gain is higher compared to the conventional buck-boost converter. With a moderate duty cycle, high voltage gain can be reached. The switch's voltage stress is minimal. As a consequence, the power switch's conduction loss is relatively low to improve efficiency. The converter is simple, hence it will be easy to control the proposed converter.

scholarly journals High voltage gain and conversion using bidirectional converter in microgrid and electric vehicle systems

2021 ◽  
Vol 1964 (5) ◽  
pp. 052016
Author(s):  
L. Annie Isabella ◽  
Y. Alexander Jeevanantham ◽  
Chandla Ellis ◽  
R. Kameshwaran
Keyword(s):  
Electric Vehicle ◽  
High Voltage ◽  
Voltage Gain ◽  
High Voltage Gain ◽  
Bidirectional Converter ◽  
Vehicle Systems
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